There is not a way right now to repeat items in the form, this has been a common question and brought to the product team's attention as something that may come into the future. But for now, you will have to keep inputting that.
You can also add repeatable lines though in your preferences that might lead to a faster solution. If you need help setting that up I would recommend calling in and getting on the phone with an analyst here or use the messenger on the Fulfillment site for a prompt response.
SPS's phone number 1-888-739-3232 Option 1 and then option 1 again